/*
 *  Copyright 2010 thiago.
 *
 *  Licensed under the Apache License, Version 2.0 (the "License");
 *  you may not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *       http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 *  under the License.
 */

package com.googlecode.npuzzle.logic;

/**
 *
 * @author thiago
 */
public enum Command {

    UP, DOWN, LEFT, RIGHT;

    public static Command opposite(Command cmd) {
        switch (cmd) {
            case UP:
                return DOWN;
            case DOWN:
                return UP;
            case LEFT:
                return RIGHT;
            case RIGHT:
                return LEFT;
            default:
                throw new IllegalArgumentException("No Command found.");
        }
    }
}
